Disk harrow.



C- .A- .FARNHAM.

DISK HARROW' APPLICATION FILED 0m. 1. 1912 Patented Apr. 13, 1915.

3 BHEETSSHEBT 1.

I'VITNESSLS: INVENTOR.

I THE NORRIS PETER-i CO, PHOTIFLITHQH WASHINGTON. D. Q

C. A. FARNHAIVI. DISK HARROW. APPUCATIION man nor. 1, 1912.

1 11mm Ptented Apr. 13, 1915.

2 BHEETS-SHEBT 2.

WITNESSES} INVENTOR.

By a I 6 ATTORNEYQS CHARLES A. FARNHAM, OF ROSS, IOWA.

DISK HABROW.

Application filed October 7, 1912.

To all whom it may concern:

Be it known that 1, CHARLES A. FARN- HAM, a citizen of the United States, residing at Ross, in the county of Audubon and State of Iowa, have invented certain new and useful Improvements in Disk Hal-rows, of which the following is a specification.

The object of my invention is to provide a disk harrow of simple and durable construction.

A further object is to provide in such a harrow means for mounting the disk blades, so constructed and arranged that any one or all of the disk blades may be quickly and easily removed from the harrow for sharpening, repairing, or replacing said blades.

A further object is to provide a disk harrow, especially adapted for use in ground Which has been planted to corn, having the disks so arranged as to level the ridges ordinarily found in corn fields.

A further object is to provide in such a harrow a plurality of disks, each made of aplurality of blades so constructed and arranged that the blades may be readily removable or taken apart for replacing or repairing any of the blade sections.

My invention consists in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in myclaimsand illustrated in the accompanying drawings, in which- Figure 1 shows a top or plan view of the disk harrow embodying my invention. Fig. 2 shows a side elevation of same. Fig. 3 shows a central, vertical, longitudinal, sectional view through the sleeves of one of the axle sections and through the disks mounted on said section. Fig. 1 shows a detailed view of one of the sleeve sections. Fig. 5 shows a detailed, sectional view of the front axle and means whereby the same is mounted on the frame of the harrow. Fig. 6 shows a detailed view of the washer of one of the axle sections. Fig. 7 shows an enlarged detailed View of one of the disks, showing the manner in which the sections thereof are placed together, and Fig. 8 shows a sectional view through one of the axle sections, the sleeve thereon and the means whereby said sleeve is mounted on the machine. 7

In the accompanying drawings, T have used the reference numeral 10 to indicate Specification of Letters Patent.

Patented Apr. 13, 1215.

Serial No. 724,447.

the tongue of my improved disk harrow. Extending rearwardly from the tongue is a beam 11, on the rear end of which is mounted a seat 12. Extending laterally, rearwardly and downwardly from each side of the forward end of the beam 11 are frame members 13. Connecting the rear ends of the frame members 13 is a transverse frame member 14. Extending transversely across one side of the machine, on each side of the rear portion thereof, is a pair of transverse frame members 15, connected at their outer ends by frame members 16. At the inner end of each pair of frame members 15 are parallel frame members 17 connected at their forward ends by frame members 18. The rear member of each pair of members 15 connects the rear ends of one of the pairs of members 17 and the outer member of each pair 17 connects the inner ends of one of the pairs 15, as clearly shown in Fig. 1.

It will be understood that the construction of the parts heretofore described may be varied in many particulars, it being simply necessary to have a strong suitable frame for mounting the disk blades hereinafter more fully described. 1

The forward end of the beam 11 is moun ed upon a pair of front wheels 19 in the following manner. The wheels 19 are mounted on an axle 20. Mounted on the beam 11 is a vertical shaft 21, the lower end of which is bifurcated forming arms 22 which are pivoted to the axle 20, as shown in Fig. 5. Beneath the beam 11 a collar 23 is mounted on the shaft 21 and is adjustably held in position thereon'by means of a set screw 24. ll preferablv secure a brace 25 to the-lower part of the shaft 21 and extend it upwardly and rearwardly to the beam 11 to which its rear end is secured.

T preferably mount my disk blades on the frame of my improved disk harrow in groups or gangs of three. It will be understood that 1 can mount as many of these groups as desired and that three or more of the disks may be mounted on each axle section.

As shown in the drawings, my disk harrow is provided with six groups of disks and is designed to harrow a space as wide as three ordinary corn rows. The outer groups or gangs 1 shall call the outer gangs and the gangs next to them the intermediate gangs, The two outer groups of rat disks are mounted on the frame in the following manner. For each group I provide an axle section 26, clearly shown in Fig. 3. Mounted on each axle section are two sleeves 27, each having at one end a circumferential, annular flange 2S, and at the other end, a

circumferential annular flange 29, having of. which is mounted on one of the enlarged portions 30 of the sleeve 27, preferably in the following manner. The lower end of each arm 33 is provided with a curved flange 34 extending half way around the enlarged portion of the boss 30 of the sleeve 27 and forming a socket. At the outer edge of the flange 34, on' opposite sides thereof, are laterally extending flanges or lugs 35, extending rearwardly and forwardly from the flange 34. Beneath the boss 30 .in each case is a bearing member or socket 36, having on opposite sides rearwardly and for wardly extending flanges or lugs 37 designed to rest against the lower sides of the flanges 35. The rear flanges 35 and 37 are secured together by bolts 38 on which are nuts 39. The lower, forward portion of each forward flange 35 and the upper forward portion of each flange 37 are cut away to receive the rear end of an arm and 50. The arms 40 and 50 are secured to the flanges 37 and 35 by means of bolts 38 and nuts 39. The forward ends of the arms 40 of the outer gang are secured to the frame of the machine in any suitable manner as are also the arms 50 .of'the intermediate gangs. The arms 40 ofthe outer gangs are connected to the flanges 35 and 37 farthest from the center of the machine. The arms 50 of the outer gangs, and the arms 40 of the intermediate gangs are pivoted at their forward ends to extensions 51 or levers 52. Mounted on the frame of the machine on the levers 52, are spring actuated pawls 53, designed to coact with sectors 54 on the frame of the machine. The axle sections 26, of the outer gangs, are arranged substantially horizontally at an acute angle to the longitudinal axis of the harrow, as shown in Fig. 1, and are inclined from their outer ends inwardly and rearwardly.

The axles 26 of the intermediate gangs are substantially horizontal and are inclined from their inner ends rearwardly and outwardly, as shown in Fig. 1.

Mounted on the frame of the machine, between the intermediate gangs and forner ends forwardly and outwardly.

wardly therefrom are the two inner gangs. The shafts 31 of the inner gangs are mounted in blocks 31 between the forward ends of the frame members 17. The axles 26 of the inner sections extend from their in- The sleeves 27 are connected with arms 50 which are suitably mounted on the frame, and with arms 40. The forward ends of the arms 40 are pivoted to the extensions 60 on a lever 61 fulcrumed on the frame, whereby the inner ends of the inner gangs may be moved rearwardly or forwardly. The lever 61 is provided with a spring actuated pawl 62 arranged to meet with a sector 63.

I preferably mount on each of the axle sections 26, three disks, each composed of a plurality of blade sections 41. The blade sections 41 have substantially the form of the blade of an ordinary spading disk. An improved feature of their constructiomhowever, is that each of the blade sections is made entirely independent of and detachable from the other blade sections and the axle and sleeves. At the inner ends of the blade sections 41, I have provided beveled edges 42, so arranged that the blade sections may be arranged in a series around the axle with their inner ends in the same plane, as shown in Fig. 7.

At the inner end of each blade section 42 is a laterally extending curved flange 43, designed to fit the axle 26 and to be received in the annular slot in the end of the adjacent sleeve 27.

On one end of the axle section 26, I place an ordinary washer 44 and a nut 45, and on the other end of the blades a washer 47, having a central annular slot 48 to receive the flanges 43 of the disk blade sections, and outside the washer 47 I place a nut 45. It will be understood that the sleeves 27 are rotatably mounted in the flanges 34 and the bearings members 36.

It is understood that my disk harrow is of suflicient width so that the center of the harrow will travel along one corn row and that the adjacent disks of the outer and intermediate gang on each side of the machine will travel along other corn rows. In this connection it may be noted also that the blades of the disks 41 of the inner and outer gangs are preferably faced slightly outwardly and the blades of the disks of the other gangs are faced slightly inwardly.

On account of the inclination of the blades of the disks, and of the inclination of the axle sections with relation to the longitudinal axis of the harrow, it will be seen that the effect of the operation of the disks, when the machine is drawn forwardly, will be to level the ridges along the corn rows. I consider this one of the advantages of my machine. By operating the levers 52 and 61, the axle sections may be brought more nearly or farther from position at right angles to the path of the machine, as may be desired.

Among the other advantages of my improved disk harrow is the form of the inner ends of the disk blades, and the means whereby said blades are mounted on the axle sections. It will be seen that if, for instance, any of the disk blades 41 are inj med or become dull, that they may be readily removed from the axle section 26 by loosening the nuts 45 and 39 and removing the washers 44 and i7 and one of the sleeves 27. The disk blades may then be sharpened or replaced with other disk blades and may be quickly and readily reassembled in the machine.

I claim as my invention:

1. In a device of the class described, a frame, a pair of shafts pivotally mounted thereon to swing in a horizontal plane, said shafts being inclined from their adjacent rear ends forwardly and laterally, means for simultaneously swinging said shafts on their pivotal points, two pairs of shafts mounted rearwardly on the frame from said first shafts, and on opposite sides thereof in the frame, the members of the other pairs of said shafts.

2. In a device of the class described, a frame, a plurality of downwardly extending shafts mounted on said frame, a pair of shafts pivotally mounted on two of said downwardly extending shafts to swing in a horizontal plane, means for simultaneously moving said pair of shafts on their pivotal points, a pair of shafts on each side of said first pair and mounted rearwardly in the frame with relation to said first pair, said rearward pair of shafts being pivotally mounted on some of said downwardly extending shafts, separate means whereby either of said rearward pair of shafts may be simultaneously moved upon their pivotal points, and disks on said shafts.

CHARLES A. FARNHAM.

Witnesses:

WM. NORTHRUP, E. L. FINGH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

